Networks

Networks

1. Disadvantages

   • COST: networks are expensive to set up
   • INCREASED RISK: problems such as viruses can affect every computer on the network
   • DIFFICULTY: expertise is needed to set up and maintain a network

2. Advantages

   • SHARE FILES: so the same files are available, whichever computer you use
   • SHARE RESOURCES: such as printers and the internet
   • SHARE LOGINS: so the same username and password can be used on every computer in the network

3. Types of Networks

   • LAN: Local Area Network
   • WAN: Wide Area Network

4. Topologies

   • Ring
     • Advantages
       • Cheap to install
       • No collisions
       • Fast
     • Disadvantages
       • high chance of catastrophic failure
       • Difficult to expand
   • Star
     • Advantages
       • Low chance of failure
       • No collisions
       • Fast
     • Disadvantages
       • Expensive
       • Depends on a switch
   • Bus
     • Advantages
       • Cheap to install
     • Disadvantages
       • High chance of catastrophic failure
       • Lots of collision
       • Slows down as more computers are added

5. IP Adresses

   • Definition
     • An IP adress is a unique value assigned to every computer on a network
   • what is it for?
     • so a computer know swhether or not to keep the message that is sent to it
   • How many IP adresses are there
     • 4 billion+
   • What does one look like?
     • 86.188.242.210